EPA v. LONDONDERRY MS4

Case summary

On September 28, 2023, EPA issued a Clean Water Act (CWA) Administrative Compliance Order (Order) to the Town of Londonderry, New Hampshire for alleged violation of the 2017 General Permit for Stormwater Discharges from Small Municipal Separate Storm Sewer Systems in New Hampshire (2017 MS4 Permit). The Order cites the Town's respective failures to develop or modify, as appropriate, a post-construction stormwater management ordinance within three years of the effective date of the Permit (i.e., by July 1, 2022). The Order requires the Town to enact a post-construction stormwater management ordinance or other regulatory mechanism by June 30, 2024, notify EPA that such an ordinance or regulatory mechanism has become effective within seven days of its effective date, and provide EPA with a copy of the regulatory mechanism. The Order will facilitate the reduction of pollutants found in the Town's stormwater through the retention or treatment of stormwater after construction on new or redeveloped sites. The Region coordinated with the Hampshire Department of Environmental Services (NHDES) on this matter.

Defendants (1)

• Town of Londonderry, NHNamed in complaintNamed in settlement

Facilities (1)

• LONDONDERRY MS4

  TOWNWIDE, LONDONDERRY, NH, 03053

  Registry ID: 110070159152

Statutes cited

• CWA 301/402 — NPDES Permit Violations

Enforcement conclusions (1)

• LONDONDERRY MS4entered 2023-09-28

  Primary law: CWA

Timeline (3 milestones)

• 2023-09-28Complaint Filed/Proposed Order
• 2023-09-28Enforcement Action Data Entered
• 2023-09-28Final Order Issued